2061643201 has 2 divisors, whose sum is σ = 2061643202. Its totient is φ = 2061643200.

The previous prime is 2061643123. The next prime is 2061643211. The reversal of 2061643201 is 1023461602.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1455498801 + 606144400 = 38151^2 + 24620^2 .

It is a cyclic number.

It is not a de Polignac number, because 2061643201 - 2²⁹ = 1524772289 is a prime.

It is not a weakly prime, because it can be changed into another prime (2061643211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1030821600 + 1030821601.

It is an arithmetic number, because the mean of its divisors is an integer number (1030821601).

Almost surely, 2^2061643201 is an apocalyptic number.

It is an amenable number.

2061643201 is a deficient number, since it is larger than the sum of its proper divisors (1).

2061643201 is an equidigital number, since it uses as much as digits as its factorization.

2061643201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 2061643201 is about 45405.3212850653. The cubic root of 2061643201 is about 1272.7345547714.

The spelling of 2061643201 in words is "two billion, sixty-one million, six hundred forty-three thousand, two hundred one".